Home / 8,720.21-13,078.35-2,480.09

Finding the Fourth Proportional to 8,720.21, 13,078.35 and 2,480.09

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Solution

The fourth proportional to 8,720.21, 13,078.35 and 2,480.09 is: 3,719.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.21 : 13,078.35 = 2,480.09 : x
  2. Step 2: Convert to fraction form
    8,720.21/13,078.35 = 2,480.09/x
  3. Step 3: Cross multiply
    8,720.21x = 13,078.35 × 2,480.09
  4. Step 4: Simplify right side
    8,720.21x = 32,435,419.66
  5. Step 5: Solve for x
    x = 32,435,419.66/8,720.21
  6. Step 6: Final answer
    x = 3,719.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.